Objective: Determine the radius of curvature of various watch glasses.
From the height h of a spherical surface above a point on a plane defined by the corners of an equilateral triangle, the radius of curvature R of the spherical surface may be determined. This can be done for both convex and concave curvatures of the sphere.
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![Set of 10 Watch Glass Dishes, 80 mm, 1002868 [U14200], Glassware](/thumblibrary/U14200/U14200_01_140_140_Set-of-10-Watch-Glass-Dishes-80-mm.jpg)
![Precision Sphereometer, 1002947 [U15030], Measurement of Length](/thumblibrary/U15030/U15030_01_140_140_Precision-Sphereometer.jpg)
![Set of 10 Watch Glass Dishes, 120 mm, 1002869 [U14201], Glassware](/thumblibrary/U14201/U14201_01_140_140_Set-of-10-Watch-Glass-Dishes-120-mm.jpg)
![Plane Mirror, 1003190 [U21885], Glassware](/thumblibrary/U21885/U21885_01_140_140_Plane-Mirror.jpg)
![DC Power Supply,
0 – 20 V, 0 – 5 A, 1003312 [U33020-230], Power Supplies](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-0-20-V-0-5-A.jpg)
![Height Measuring Ruler, 1 m, 1000743 [U8401560], Measurement of Length](/thumblibrary/U8401560/U8401560_01_140_140_Height-Measuring-Ruler-1-m.jpg)
![Photo Gate, 1000563 [U11365], Sensors for Physics](/thumblibrary/U11365/U11365_01_140_140_Photo-Gate.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Tripod Stand 150 mm, 1002835 [U13270], Bases](/thumblibrary/U13270/U13270_01_140_140_Tripod-Stand-150-mm.jpg)
![Safety Experiment Leads, 75 cm, 2.5 mm², black, (2 pcs), 1002849 [U13812], Experiment Leads and Cables](/thumblibrary/U13812/U13812_01_140_140_Safety-Experiment-Leads-75-cm-25-mm-black-2-pcs.jpg)
![Set of Riders for Rulers, 1006494 [U8401570], Measurement of Length](/thumblibrary/U8401570/U8401570_01_140_140_Set-of-Riders-for-Rulers.jpg)
![Digital Counter, 1001033 [U8533341-230], Digital Counters](/thumblibrary/U8533341-230/U8533341-230_01_140_140_Digital-Counter.jpg)
![Analogue Multimeter ESCOLA 30, 1013526 [U8557330], Hand-held Analog Measuring Instruments](/thumblibrary/U8557330/U8557330_01_140_140_Analogue-Multimeter-ESCOLA-30.jpg)
![Clamp for Projectile Launcher, 1002655 [U10361], Oblique throw - Accessory](/thumblibrary/U10361/U10361_01_140_140_Clamp-for-Projectile-Launcher.jpg)
![Set of Slotted Weights, 20-100 g, 1003226 [U30030], Balance Weights](/thumblibrary/U30030/U30030_01_140_140_Set-of-Slotted-Weights-20-100-g.jpg)
![Microphone Box, 1014520 [U8498283-230], Sound – Accessory](/thumblibrary/U8498283-230/U8498283-230_01_140_140_Microphone-Box.jpg)
![DC Power Supply,
0 – 450 V, max. 10 µA, 1008535 [U8521400-230], Power Supplies](/thumblibrary/U8521400-230/U8521400-230_01_140_140_DC-Power-Supply-0-450-V-max-10-µA.jpg)
![Electric Field Meter, 1021405 [U8557820-230], Electrostatics](/thumblibrary/U8557820-230/U8557820-230_01_140_140_Electric-Field-Meter.jpg)
![Experiment: Hooke's Law, Basic equipment, 8000747 [UE1020100], Forces](/thumblibrary/UE1020100/UE1020100_01_140_140_Experiment-Hookes-Law-Basic-equipment.jpg)
![Experiment:
Kirchhoff’s Laws, 8000615 [UE3020330-230], Charge transport and current](/thumblibrary/UE3020330-230/UE3020330-230_01_140_140_Experiment-Kirchhoff-s-Laws.jpg)